TSEOQ · Trinseo PLC · Shareholders & Ownership
Substantial doubt about the company's ability to continue as a going concern.
“As a result of the Company's financial condition, indebtedness, Chapter 11 proceedings, and the uncertainties associated with confirmation and consummation of the Plan, including the resolution of pending disputes and litigation involving certain minority lenders, the Company has concluded that substantial doubt exists about its ability to continue as a going concern within one year after the date of issuance of these condensed consolidated financial statements.”View the 10-Q filed Nov 9, 2026
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Every disclosed holder of TSEOQ in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns TSEOQ
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 412,655 | 1.13% |
| Insiders (Forms 3, 4, 5) | 0 | 0.00% |
| 13D/G-only blocks | 0 | 0.00% |
| Remaining | 36,147,213 | 98.87% |
| Registered funds (N-PORT, not summed) | 0 | 0.00% |
Shares outstanding: 36,559,868, the issuer's latest cover-page count restated onto today's split basis.
Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of TSEOQ
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
BOZICH FRANK A
Insider
CIK 1660737 · Feb 27, 2026
Director, CEO AND PRESIDENT, issuer-wide, not summed
|
664,689 | ||
| 2 |
GAMMA Investing LLC
13F
CIK 2010235 · Registered investment adviser · Sep 30, 2026
|
412,655 | ||
| 3 |
Chaclas Angelo N.
Insider
CIK 1629821 · Feb 27, 2026
SVP, CLO, CCO & CORP. SEC., issuer-wide, not summed
|
274,798 | ||
| 4 |
|
254,788 | ||
| 5 |
|
216,202 | ||
| 6 |
|
207,741 | ||
| 7 |
Reverberi Francesca
Insider
CIK 1811002 · Feb 27, 2026
SVP, EM and Polymer Solutions, issuer-wide, not summed
|
161,250 | ||
| 8 |
|
118,318 | ||
| 9 |
Schewe Rainer
Insider
CIK 1661138 · Feb 27, 2026
SVP, SUPPLY CHAIN & MFG SVCS, issuer-wide, not summed
|
103,415 | ||
| 10 |
van Kessel Bregje
Insider
CIK 1949985 · Feb 27, 2026
SVP, Corporate Finance & IR, issuer-wide, not summed
|
98,296 | ||
| 11 |
Hendriks Han
Insider
CIK 1946359 · Feb 27, 2026
SVP, CHIEF TECHNOLOGY OFFICER, issuer-wide, not summed
|
73,362 | ||
| 12 |
|
53,453 | ||
| 13 |
|
52,187 | ||
| 14 |
|
49,457 | ||
| 15 |
|
48,429 | ||
| 16 |
|
46,552 | ||
| 17 |
Greene Roger
Insider
CIK 1994764 · Feb 27, 2026
VP, GLOBAL CONTROLLER & PAO, issuer-wide, not summed
|
45,101 | ||
| 18 |
|
44,776 | ||
| 19 |
|
40,741 | ||
| 20 |
|
36,619 | ||
| 21 |
|
36,174 | ||
| 22 |
|
15,898 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.